Where's the neither option?
I mean, sports films are pretty rubbish, but it doesn't take many zombie films for you to get bored and quit.
The neither option is to abstain. It makes no sense to have a neither option. The poll is asking which is better, so either choose one, or none (effectively choosing both and saying they're equally good/bad).
Besides, it doesn't matter if you can get bored of zombie films by watching many.
The question is asking, which you would prefer to watch on average, given the choice of the two. Not which would you choose to watch forever.